[ILUG] Routing question - I think :-)

[Niall O Broin]

We have two servers which are hosted in a colo facility. One (A) is currently 
the primary mail server for a number of domains. I want to make the other (B) 
the secondary server for these domains. Both servers have two LAN 
connections, the second being used for an RFC1918 private network. I would 
like to figure out a way of getting traffic to go from server A to server B 
over the private LAN so that email which lands on B (which will be mostly 
spam, sadly) and is thence forwarded to A travels over the private LAN (where 
bandwidth is not chargeable). Is there any way of doing this, given that the 
public addresses of A are not bound to the private network's NIC?



-- 
Niall